Retard gauge



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E. B. CROCKER RETARD GAUGE v original Filed "Sem 1e, 1920v 2 Sheets-Sheet 1 AAA QM. @www www? E. B. CROCKER.

RETARD GAUGE Original Filed Sept. 16, 1920 2 Sheets-Sheet 2 Z/Z rele WP Patented Dec. 15, 1925'. f

i Unirse STA-TES ERNEST B. CROCKER, O'il STRATIOBD, CONNECTICUT, ASSIGNOR TO ,MANNINQ MAX- PATENT oFFlcE.

NELL t MOORE, INC., F NEW YOBLN. Y., A CORPORATION OF JERSEY,

RETARD GAUGE.

Application led September 16, 1920, Serial No. 410,631. Renewed May 12, 1925.

[o all whom t may concern.'

Be it known that ERNEST CROCKER, a citizen of the United States, residing at Stratford, county of Fairfield, State of Connccticut, have made a certain new and useful Invention in Retard Gauges, of which the following is a specification.

This invention relates to pressure gauges,

and particularlyto pressure gauges of the retard type.

rllhe object of the invention is to provide a pressure gauge of the retard type which is simple in structure, economical to manufacture, strong, rugged and durable in use, and eliicielnt in operation.

A further object or the inventionv is toA provide a pressure gauge wherein provisiony tions which impose the retarding action upon the pressure responsive element of the gauge and an independent adjustment of the normal action of the pressure responsive element.

A further object ot the invention is to secure compactness, ruggedness, strength and eriiciency in retard gauge structures.

Other objects of the invention will appear more fully hereinafter.

The invention consists substantially in the construction, arrangement, combination and location of parts, all as will be more fully hereinafter set forth, as shown in the accompanying drawings and finally pointed out in the appended claims.

Referring to the accompanying drawings:

Fig. l a view in face elevation of a retard gauge structure embodying the principles of my invention, portions of the transparent cover plate and associated dial being broken out.

Fig. 2 is a view in section on the line 2--2, F ig. l, looking in the direction of the arrows.

Fig. 3 is a broken detail view in perspective showing the connections intermediate the pressure responsive element and gauges it is a common expedient to vgrady uate the dial plate with equally spaced divisions, each corresponding topa given degree of pressure to be indicated thereby. It

sometimes occurs that the pressure responsive element of the gauge 1s subjected to A,abnormal orsuddenly imposed pressures in excess of that for which the dial is graduated, therebytending to rupture or otherwise injure the pressure responsive element or its associated mechanism, f or unduly strain the same. For example, in case oi' excessivev or over-pressures, suddenly imosed, the danger is incurred of causing the A dial hand to be thrown violently against its limit stop pin, thereby bending, twisting or otherwise injuring such hand or its actuating devices, or impairing the accuracy ot the adjustments, and in the case of Bourdon tube gauges the danger is incurred of rupturing the tubel or causing a more or less permanent set in the same, thereby impair ing, if not destroying, it or its adjustment. Various retard devices have been proposed, the purpose of which is to impose an auxiliary or'additional yielding resistance to the movement ofthe pressure responsive element ulnder the influence off the pressure to which `said element is subjected, and which, while permitting the normal use .and op eration of they instrument under normal pressure variations, takes and yieldingly absorbs abnormal movements under conditions of abnormal or suddenly Aapplied excessive pressures, the auxiliary or additional resistance being brought into effective action only after a given pressure to which the gauge is subjectedis exceeded. It is desirable to indicate the abnormal or excessive presico sures, and the movements ofi the gauge parts under abnormal or ssive pressure conditions may be indicated hy providingthe dial plate with more closely spaced graduetions at the required point.

The present invention es partici-ini -y A @wird Luis 7* e :i` since seni retard tot.; 950 *l MADE nd i ul el l gauges are required to moet the ef-:igeiicies et er: cssive and suddenly applied anno Il pressures, they must be simple, compact and in structure, in order to at-twin ei:- iciency, so as to enable them to meet 'the rcquii'ements. in addition to this requirement, it is also desirable to provide means vn AL not only `for 1justin@ the action oi the pressi-.rc responsive device when operating fecucd independently of each ot ier in or( er a. 471. 1. io attain the best results.

l is among the special purposes ot the present invention to provide a retard iii/'e Il ure which is capable of inee'tino requi lenients `and sioni-ing the adva referred to, and others, ii a most and effective manner.

in the accoinpanying` drawings l have illustuted a retard gauge structure embodyl ing` the principles 01" my invention as aplied to gauges of the Bourdon tube type,

it to be understood thet my ii venii L scope, and defined in .i its broadest claims, is not to be limited or restricted rec pa rtieular type.

In the drawings, reference numeral (3 designates the gauge case Within which the vaious parts are mounted. ln the illustrative embodiment shown, this ase is in the forni ot a cup. lWitl the cup is mounted the usual dial plate 'i'. rBhe ease is also provided with the usual transrpareni 'lace plate or cover H, which is retained in place 'over the open side or face oi the euse by any suitable or desir id n cans, such as the retaining ring` 9.

Extending into the case through its peripheral Wall is the socket member l0, aeapted for connection to the source ot pressure to be indicated by the instrument.

li'ounted upon and in suitable connection With the socket member l0, is the pressi-ile responsive member "il, which, in the stru ture selected for illustration., is the o rdinu ry 'lourdon tube. Y

lilounte l upon one iacc ol'V the si inember l0 is a standard iii, upon which is supported a bri cliet The standard and bracket 1,25, and the studs i4., which connect them together, constitute framework in Which the Workiny i TheY auge movei yielding resistance to the a rangement shown, ineliu Which is journaled ii. tl extends through the di l ries the hand or pointer die l5, is mounted the p bia-sing or hair spring` with the spindle 1*.

li/ieshing with the p sector 19, which mo.

'on L lio 20, carried by the frei clampec to the nestor i fonnections heir-.veen `the pressure responsive element il, and 'die sectl` i9. 'lliis adjustment i ay be seeured in riany dii'erent -nays.

"il i A simple arrauzgeiuen' s shoivn vih-@rein the plat 2l is 'formed W i an elo A 2d, through which extends the screw Q5, by which said il clamp v\d to the sector 19. By a d ihe plate is adjustable upon the sector .eei'eby varyingthe length of the lever arm through which the sector is rocked by the afi-tion of lihe pressure responsive elen ll, when operating unuer normal com i .-ns pres-- sure variation.

l Will novv describe my invention for apply'ne c sure responsive element in c abnormal or suddenly aipl imposed on the pressure ment ll.

To a second lip` n the e pressure responsive elem/ut il.

one end of a link 27. r 8 is adjustably mounted in the oth of link 27.

This adjustment may be cured by three l ing the end of the sy through z tlii'eaded opening,` :n the oi the link l fire and retaining;` the .es i insu ent o'i the stud by iiicairf of a set n f The stud v-Jorlrs freely through an opening` ii a sprl niemeer 30, in the oi l' iary oieration of the gauge under nerr. al i r riations. hen, however, an excessive, abnormal or suddenly applied pressure is imposed on the pressure responsive element il the head oi2 the stud engages the spring member thereby applving` L.il auxiliary yielding,T :springl resistance to the action ot the pressure responV element d hi te the purts the re- The are relieved oit e-:cessive stra terdinp` action o eepend ent istnient e press which the retard e To secure ruggedne s ie i ugh which the retard action is applied, the

' and ruggedness is necess ESO f ous adjustments, as Well as theadju spring member 53() is 'n the form oi a` which' is mou tee ae-.heldin any co isnt manner. simple and effective aiIH rent in A y wherein the socket niemeer l() is te i' at upper end with a planed oii'sait 'vitae-'e F32, upon `which one end or the sp plate rests and is clamped, To seein desirable adjustnientk oi ythe sti-l'ness or the spring slate SO, and hence or lleibility, a slotted plate CEB, is placed upon und clamped to the spring plate. By :,idji'isting` tiis clamp plate lengthwise upon the spring plate, the tieribility of the latter isl adjusted.

From the tor ng desc.' )e seen that I prm compact and rugged strlu cially is this true of the par the retardin, action is seci important ature or my this action Ybfought inte op required only under conditions of or abnormal pressure, and hence am enabled to secure a adjustments, not oniv of erate under normal conf the parts which are breng under abnormal conditions, and t or the stillness oit theretard *spi-inf fected independentlii of each other, thereby permitting accurate ealibrationoi' the dialk plate graduations, not only for the rnormal pressure variations, but also for the abnormal oreficessive pressure v 1ations.

'It Will be understood that any suitable system of graduation oi' the dial plate may be employed. For' illustration for a gauge designed to indicate r mum pressure ot say one hundred pounds under normal conditions,.the dial plate might begraduated in the normal manner for about OO ot the circle, While the nent BOO of the circle will be graduated for a ixiinun'i oi 'three hundred pounds j'n'essuro, or three times Yhat et the normal operation oi the ins-tren thi arangfe of dr ions will correspond to three times he maximum pressure for which the dial plate is graduated 'tor normal operation throughout 2400 of the circle.

Having 'now set forth the objects and nature of my invention, and a structure embodying theprineiples thereof, I Wish it to be understood "that many variations rand changes indetails would readily occur to persons skilled in the art and stillrip'all within the spirit and scope ormy invention. I

do not desire, therefore, to be limited to the exact details shown and described.

But What I claim as new and useful and ol my own invention, and desire to secure by Leiters Patentis:

)1. In a pressure gauge and in combination With a pressure responsive element and connections to effect indications ofnormal'pressure variations, ot means to impose an auxiliary yielding resistance upon the action of the pressure responsive element under con` ditions of abnormal or excessive pressure, means providing a screw adjustment tovarf, the point in the movement olf the pressure responsivel element atvvvhich the application oi said auxiliary means is initiated, and means for adjusting said `auxiliary means to vary the amount of said resistance.

2L In a.l pressure gauge and in combination with the pressure responsive element and connections to eilect indications voi normal pressure variations, of means to impose an auxiliary yielding resistance upon'the action or the pressure responsive element under conditions of abnormal or excessive pressure,

adjustbale .means permitting Athe auxiliary resistance means tobe adjusted to vary the point in the movement ofthe pressure responsive element at which the application oi means independent `ot'said last mentioned'v 'QI means permitting thedegree ot movement'o'i said connections by said 'pressure responsive element when responding to any given variation in said pressure to be adjusted.

3. In a pressure gauge, a graduated dial,

a hand or pointer cooperating therewith, a pressurel responsive element, connections intermediate said element and Lhand or pointer'to actuate the latter, and adjustable means permitting said connections Ato be adjusted, in combination With-an auxiliary retard spring member, independent -connections intermediate. said pressure responsive element and said `retard spring member, and adjustable means for varying the lenibility of said spring member. n

4f. In avr pressure gauge, a graduated dial, a hand or pointer cooperating therewith, a pressure responsive element, connections intermediate said elementfand hand or pointer tov actuate the latter, and adjustable means permitting adjustment Vot said connections, in combination with an auxiliary retard spring member, independent connections intermediatesaid pressure responsive element and said vretard spring member, adjustable means for varying the flexibility oi said spring member, and adjustable moana 'permitting adjustment of said independent connections.

5. In a pressure guage, agraduated dial, a hand or pointer cooperating therewith, a pressure responsive element, connections intermediate said elementv and hand 'or pointer to actua-te the latter, in combination With means also connected to the pressure responsive element including an auxiliary retard ibility of said spring member.

(LTI

6. In a pressure gauge, a graduated dial, a hand or pointer cooperating therewith, a pressure responsive element, socket inember upon which said responsive element is mounted, connections intermediate said element and hand or pointer to actuate the latter, in combination with a spring plato rigidly held at one end upon Said socket member, and adjustable connections between the free end of said spring plate and the pressure responsive element.

7. In a pressure gauge, a graduated dial, a hand or pointer cooperating therewith, a pressure responsive element, connections intermediate said element and hand or pointer to actuate the latter, in combination with a spring plate rigidly held at one end, and means connected to the pressure responsive element including a headed stud loosely passing through the free end of said spring plate.

S. ln a pressure gauge, a graduated dial, a hand or pointer Cooperating therewith, a pressure responsive element, connections'intermediate said element and hand or pointer to actuate the latter, in combination with a spring plate supported at one end, and means connected to the pressure responsive element including` a headed stud loosely passing through the free end ot said spring plate.

9. In a pressure gauge, a socketmember, a Bourdon tube connected at one end thereto, a dial hand, connections intermediate the free end of said tube and said hand to actuate the latter, in combination with a spring' plate mounted at one end upon said socket member, and means connected to the pressure responsive element including a headed stud Working loosely thr-ougli the free end of said spring plate.

l0. In a pressure gauge, a socket member, a Bourdon tube connected at one end thereto, a dial hand, connections intermediate the free end ot said tube and said hand to actuate the latter', in combination with a spring plate mounted at one. end upon said socket member, and means adjustably connected to the tree end of the tube including a headed stud working loosely through the t'ree end of said spring plate.

ll. ln a pressure gauge, a socket member, a Bourdon tube connected at one end thereto, a dial hand, connections intermediate the i'ree end ot said tube and said hand to actuate the latter, in combination With a spring plate mounted at one end upon said socket nieniber, a headed stud work-ing` loosely through the free end of said spring plate, and a link connected to the free end of said tube, said stud being adjustably connected to said link.

l2. ln a pressure gauge, a socket ineinber, a Bourdon tube connected at one end thereto, a dial hand, connections intermediate the tree end oi said tube and said hand to actuate the latter, in combination with a spring` plate mounted at one end upon said socket member, means connected to the free enl oi the tube including a headed stud working loosely through the tree ond ot said spring plate, and a clamp plate adjustably mounted on said spring plate to 'vary 'the tlcxibility ot the latter.

l-. n a pressure gauge, a case, a socket member extending into thc case, 1 tube connected at one end 'to said socket member, a framework suuported by said socket member, a spindle mounted in said 'framework and carrying a dial hand, a sector for actuating said spindle, said sector also mounted in said framework, and a. link connecting said sector and tne tree end ot said tube, in comb., ation with inea dependently connected to the 'free the tube including a spring plate aiso mounted on said socket piece.v

14. ln a pressure gauge, a case, a socket member extending into the case, a Bourdon tube connected at one end to said socket member, a Yfraniework supported by said socket member, spindle mounted in said frainewfork and carrying a dial hand, a seetor for actuating saidv spindle, said sector also mounted .in said framework, and a link Connecting said sector and the 'tree end of said tube, in combination with a spring plate also mounted on said socket piece, a clamp plate adjustably mounted on said spring plate to Vary the stiffness ot the fiel latter, and connections intermediate the free end ot said spring plate and said tube.

l5. In a pressure gauge, a case, socket member extending into the case, Bourdon tube connected at one end to said socket men'iber, a framework supported by said socket member, a spindle mounted in said lframework and carrying a diei hand, a sector for actuating said spindle, am sr also mounted in said ywordt, and a '.1 connecting said sector and the tree end ot said tube, in con'ibination with a spring plate also .mounted on said socket piece, a headed stud working loosely through the free end of said spring plate, and a link connected to the free end oiPA `said tube, said stud having adjustable connection with said link.

In testimony whereof l hare hereunto set my hand on this third day of September A. D., 1920.

ERNEST B. CRCKER. 

